Where have you heard "Yar"? You find it with YarCom and in other well known references.
On the television show Star Trek: The Next Generation, actress Denise Crosby played the role of Tasha Yar, the Chief of Security / Tactical Officer on the USS Enterprise.
Casting a woman for this role was a revolutionary move by creator
because it placed the Enterprise's weapons in the hands of a female
Crosby returned in another "yar" role as Dr. Jenna Yar in "Star
Trek: New Voyages".
Star Trek, Natasha Yar, name and images ™ CBS Studios Inc. LLC. Delaware, 51 West 52nd Street, NY, NY 10019
In the Movies:
In the classic 1940 romantic comedy film The Philadelphia Story, Tracy Lord Dexter-Haven (Katharine Hepburn) is about to be married to George, a social-climbing businessman, when Dexter (Cary Grant), her first husband, crashes the festivities with a pair of reporters from a tabloid magazine (James Stewart and Ruth Hussy). In the scene by the pool, Tracy and George open up Dexter’s wedding present to them which is a scale model of a sailboat called the True Love. Dexter designed and built the sailboat for Tracy when they (Dexter and Tracy) were first married:
Tracy: Why it’s a model of the True Love.
George: The what?
Tracy: A boat he designed and built practically. We sailed it down the coast of Maine and back the summer we were married. My, she was yar!
George: Yar? What’s that mean?
Tracy: It means, uh... oh, what does it mean? Easy to handle, quick to the helm, fast, bright. Everything a boat should be...
The Philadelphia Story © MGM studios.